File:Islam Percent Population In Each Nation World Map Muslim Data By Pew Research.svg
Gray color for a nation means near zero % of the population in that nation is Muslim. Numbers have been rounded to nearest integer for coloring purposes.
Source: Pew Research Center, Washington DC, Religious Composition by Country (December 2012)
Accessed on: June 2014
For absolute numbers, instead of % population, see: http://www.pewforum.org/2012/12/18/table-religious-composition-by-country-in-numbers/
This is a derivative work on BlankMap-World6.svg available on wikimedia commons. It has been tested with W3C.